However, mood in mature adults (over 30 years) may be more reliant on food that increases availability of antioxidants (fruits) and abstinence of food that inappropriately activates the sympathetic nervous system (coffee, high glycemic index and skipping breakfast).

An interesting study about the effect of food prices on mortality. A team of researchers used a comparative risk assessment model to estimate the potential effects of price subsidies on healthy foods, such as fruits, vegetables, whole grains, and nuts and seeds, and taxes on processed and unprocessed red meats and sugary drinks, on the number of annual deaths from cardiometabolic diseases in the United States. The researchers found that if the prices of all seven dietary items were altered 10 percent each, an estimated 23,000 deaths per year could be prevented; this corresponds to 3.4 percent of all cardiometabolic disease deaths in the United States. A 30 percent price change almost tripled that approximation with an estimation of 63,000 deaths prevented per year, or 9.2 percent of all cardiometabolic disease deaths.